mirror of
https://github.com/matrix-construct/construct
synced 2024-12-02 11:42:41 +01:00
73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_SIMD_ACCUMULATE_H
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namespace ircd::simd
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{
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/// Accumulate into block_t by synthetic-reference. The closure has an
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/// opportunity to update the accumulator while data blocks are being
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/// streamed from the input. The mask indicates which elements of the
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/// input block are valid if the input is smaller or offset from the bs.
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template<class block_t>
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using accumulate_prototype = void (block_t &, block_t, block_t mask);
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template<class block_t,
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class input_t,
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class lambda>
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block_t accumulate(const input_t *, const u64x2, block_t, lambda&&) noexcept;
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template<class block_t,
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class lambda>
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block_t accumulate(const const_buffer &, block_t, lambda&&) noexcept;
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}
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/// Streaming accumulation
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///
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template<class block_t,
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class lambda>
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inline block_t
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ircd::simd::accumulate(const const_buffer &buf,
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block_t val,
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lambda&& closure)
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noexcept
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{
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const u64x2 max
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{
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0, size(buf),
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};
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return accumulate(data(buf), max, val, std::forward<lambda>(closure));
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}
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/// Streaming accumulation
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///
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template<class block_t,
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class input_t,
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class lambda>
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inline block_t
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ircd::simd::accumulate(const input_t *const __restrict__ in,
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const u64x2 max,
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block_t val,
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lambda&& closure)
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noexcept
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{
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const u64x2 res
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{
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for_each<block_t>(in, max, [&val, &closure]
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(const auto block, const auto mask)
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{
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closure(val, block, mask);
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})
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};
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return val;
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}
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